/* * Copyright (c) 2006 Franck Bui-Huu */ #include "cache.h" #include "builtin.h" #include "archive.h" #include "pkt-line.h" #include "sideband.h" #include "run-command.h" #include "argv-array.h" static const char upload_archive_usage[] = "git upload-archive <repo>"; static const char deadchild[] = "git upload-archive: archiver died with error"; #define MAX_ARGS (64) int cmd_upload_archive_writer(int argc, const char **argv, const char *prefix) { struct argv_array sent_argv = ARGV_ARRAY_INIT; const char *arg_cmd = "argument "; if (argc != 2) usage(upload_archive_usage); if (!enter_repo(argv[1], 0)) die("'%s' does not appear to be a git repository", argv[1]); /* put received options in sent_argv[] */ argv_array_push(&sent_argv, "git-upload-archive"); for (;;) { char *buf = packet_read_line(0, NULL); if (!buf) break; /* got a flush */ if (sent_argv.argc > MAX_ARGS) die("Too many options (>%d)", MAX_ARGS - 1); if (!starts_with(buf, arg_cmd)) die("'argument' token or flush expected"); argv_array_push(&sent_argv, buf + strlen(arg_cmd)); } /* parse all options sent by the client */ return write_archive(sent_argv.argc, sent_argv.argv, prefix, 0, NULL, 1); } __attribute__((format (printf, 1, 2))) static void error_clnt(const char *fmt, ...) { struct strbuf buf = STRBUF_INIT; va_list params; va_start(params, fmt); strbuf_vaddf(&buf, fmt, params); va_end(params); send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX); die("sent error to the client: %s", buf.buf); } static ssize_t process_input(int child_fd, int band) { char buf[16384]; ssize_t sz = read(child_fd, buf, sizeof(buf)); if (sz < 0) { if (errno != EAGAIN && errno != EINTR) error_clnt("read error: %s\n", strerror(errno)); return sz; } send_sideband(1, band, buf, sz, LARGE_PACKET_MAX); return sz; } int cmd_upload_archive(int argc, const char **argv, const char *prefix) { struct child_process writer = { argv }; /* * Set up sideband subprocess. * * We (parent) monitor and read from child, sending its fd#1 and fd#2 * multiplexed out to our fd#1. If the child dies, we tell the other * end over channel #3. */ argv[0] = "upload-archive--writer"; writer.out = writer.err = -1; writer.git_cmd = 1; if (start_command(&writer)) { int err = errno; packet_write(1, "NACK unable to spawn subprocess\n"); die("upload-archive: %s", strerror(err)); } packet_write(1, "ACK\n"); packet_flush(1); while (1) { struct pollfd pfd[2]; pfd[0].fd = writer.out; pfd[0].events = POLLIN; pfd[1].fd = writer.err; pfd[1].events = POLLIN; if (poll(pfd, 2, -1) < 0) { if (errno != EINTR) { error_errno("poll failed resuming"); sleep(1); } continue; } if (pfd[1].revents & POLLIN) /* Status stream ready */ if (process_input(pfd[1].fd, 2)) continue; if (pfd[0].revents & POLLIN) /* Data stream ready */ if (process_input(pfd[0].fd, 1)) continue; if (finish_command(&writer)) error_clnt("%s", deadchild); packet_flush(1); break; } return 0; }